| 摘要 |
PROBLEM TO BE SOLVED: To provide a visible light-active photocatalyst particle which, under the irradiation with visible light, exhibits a stable and persistent photocatalytic activity higher than that of a conventional one. SOLUTION: The photocatalyst particle mainly comprises titanium dioxide, has been doped with nitrogen anion in a concentration of 700-10,000 wt.ppm and carbon anion in a concentration of 1/30-1/3 that of the nitrogen anion, and has a particle size of 1μm or less. Its spectrum obtained by Fourier transform infrared spectroscopy has absorption peaks at wavenumbers of 340±10 cm<SP>-1</SP>and 580±50 cm<SP>-1</SP>. COPYRIGHT: (C)2005,JPO&NCIPI
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